A and B are two sets. The number of elements in A∪B is 49, the number in A is 22 and number in B is 34. How many elements are in A ∩ E?
- 105
- 27
- 15
- 12
-
7
The correct answer is: E
Explanation
Let x represent the intersection34 - x + 22 - x + x = 49
- x = 49 - 56; x = 7